Some MAME ROMs include multiple games, but only have one entry on MARP. I made some INPs but have no place to put them. The INP of the Labyrinth game in phklad I named "phklad-lab". Only the Klad game has INPs on MARP. INPs for the games in deluxe5 I named "deluxe5-3", and "deluxe5-5". Only the 4th game in deluxe5 has INPs on MARP. Finally, I have INPs for 3x3puzzl that I named "3x3puzzl-1", "3x3puzzl-2", and "3x3puzzl-3".

So many games would need splits, but sometimes, maybe because there's a new romset that has been missed, or poor interest towards games (most accurate reason I can think of), the splits may miss.
When there is no split yet, upload just the higher score and eventually keep saved the others in your hard disk, in the eventuality someone who can create splits will apply the split.
Missing split topics should be opened in Regulation Play subforum, though, by maybe putting in the thread title the romsets name(s).
On a side note, it doesn't matter how you rename INPs in the zip file you send.